Inlet valve for boilers



Ma 1 1927. y w. M. CISSELL INLET VALVE FOR BOILERS AL -f Patented May 17, 1927.

UNITED STATES PATENT OFFICE.

WILLIAM M. CISSELL, 0F LOUISVILLE, KENTUCKY.

INLET VALVE FOR BOILERS.

Application filed March 4, 1926. Serial No. 92,219.

. valve for regulating the level of water in the boiler, the valve itself being positioned in the cold water inlet pipe and therefore not subject to excessive temperature changes.

Another important object of this invention is the provision, in a boiler feed regulating device, of an improved inlet valve of a simplified construction, and which is readily removable so as to facilitate any repairs which might become necessary.

Still another and further important ob- 'ect of this invention is to provide, in an lnlet valve for steam boilers or the like, a means for permitting an inward flow of cold water through the valve, which means effectively prevents the backward passage of boiler scale or other foreign elements to the valve seat, thereby aifording a positive operation at all times.

Other and further important objects of the invention will be apparent from the disclosures in the accompanying drawings and following specification.

The invention, in a -preferred form, is illustrated in the drawings and hereinafter more full described.

In the drawings: a

Figure 1 is a vertical elevation showing the improved water regulator of this invention, parts being in section.

Figure 2 is a vertical sectional view of the valve mechanism proper.

Figure 3 is a perspective view showing the ono-poece valve seat and valve rod.

As shown in the drawings:

The reference numeral 10 indicates generally a float chamber which can be attached to any steam boiler or water heater, and which is preferably of s herical form, as shown, and has positione therein a hollow float 12 composed of suitable material. A float supporting stem 14 is affixed to the float 12 in any suitable manner and is pivotally mounted at 16 upon an upright arm 18, the upper end of which overhangs slightly as best shown in Figure 1 to afford a greater leverage.

The extreme end 20 of the float rod is adapted to co-operate with the upper end of a valve rod 22, which, with its integral valve head 24, is slid-ably mounted in a housing 2b.

As best shown in Figure 2, this housing 26 is screw threaded into a supporting plate 28 which forms a part of the spherical. float housing 10.

The upper end of the valve housing which projects into the float chamber is fitted with a plurality of openings 30, these openings, as shown in Figure 2, being formed at an angle of approximately 4-5 to the walls of the housing 26 and extending upwardly from the outside of the walls. This prevents the passage of boiler scale, sand, or other foreign materials to the interior of the valve housing 26 and thereby maintains the valve seat clean at all times.

Extensions 3?. are formed integral with the valve head 24 to permit of the free inward passage of water, and a valve head insert 34 is positioned in the valve head 24:, this insert being composed of rubber, fibre, 01' some other suitable material.

A check valve casing 42 in the shape of a T and having a one-way check valve ll therein is positioned in the interior of the casting 10 and at the bottom thereof with a resistance tube l6 attached thereto; this resistance tube extending upwardly to a point more than half way around the casting 10, thcrcbv making the opening of this resistance tube above the normal water line.

On low pressure boilers the raising and lowering of the water due to boiling point pressure has a tendency to raise and lower the float ball 10. which in turn cauvw pres sure on the valve head insert 3-4:, which j'irossure sometimes results in considerable damage in a short time, more than would ordinarily happen to such a washer here the float balls are stationary, over a period of long usage. The check valve 4 is accordingly placed at one side of the inlet to prevent the water from flowing back into the water feed and the resistance tube ll will take up the slight upward and downward movement of the water, thereby retaining the float ball in practically stationary position.

A conical valve seat 36 .lmving an opening therethrough for the passage of water is formed integral with the upper end of a fitting 38 which is attached by means of union/10 to the lower end of the valve housing 26. Removal of the union 1-0 permits of llll the complete and ready withdrawal of the entire valve apparatus for purposes of iiispection, repairs, cleaning, or the like, and as the entire valve mechanism is positioned in the cold water inlet it will be evident that the damage which ordinarily results from expatent granted hereon otherwise than as necessitated by the prior art.

I claim as my invention:

1. A iloat valve for water feeders, comprisinga spherical float chamber, a spherical float in the chamber, a pivoted lever upon one end of which the float is mounted, an overhanging pivotal support for the lover, a valve rod co-operating with the short end of the float lever, a housing for the valve rod, said housing forming a portion of the cold water supply inlet, and a combined equalizing and overflow tube in the chamber.

2. A float operated valve for water feeders, including in combination. a *alve seat and valve member and a housing; in which said valve seat and valve member are removably positioned, together with water level stabilizing means in the housing", said stabilizing means including a one way outlet valve and an overflow pipe, the one way valve bein positioned below the water line, and the 11pper end ol the overflow pipe being positioned above the normal water line.

In testimony whereof I aliix my si nature.

W lLLIAM M. ()IS I'LL. 

